Errors when modifying the multirole example into serialized connection mode

[jyang]

Hi,

I modified the example: nRF5_SDK_17.0.2_d674dde\examples\ble_central_and_peripheral\experimental\ble_app_multirole_lesc to run on a serialized connection mode with two PCA10040 boards.

The code can be built without any issues after removing software device and adding serialization lib etc.

When run it, it has connection issues with a peripheral (PCA10056, running a HRS example). When tried to connect a mobile (central), it also has problems.

I put the code on through the debugger to sure the memory is erased.

Any help I can get?

The logging is attached:

<info> app: Scanning
<info> peer_manager_handler: Peer data updated in flash: peer_id: 1, data_id: Peer rank, action: Update, no change
<info> app: CENTRAL: Connected, handle: 0.
<info> app: CENTRAL: Searching for HRS on conn_handle 0x0
<info> peer_manager_handler: Connection security failed: role: Central, conn_handle: 0x0, procedure: Encryption, error: 4102
<warning> peer_manager_handler: Disconnecting conn_handle 0.
<info> app: CENTRAL: Disconnected, handle: 0, reason: 0x16
<info> app: Scanning
<info> app_timer: RTC: initialized.
<info> app: LE Secure Connections example started.
<info> app: Scanning
<info> app: Advertising
<info> app: PERIPHERAL: Connected, handle 1.
<info> peer_manager_handler: Peer data updated in flash: peer_id: 0, data_id: Peer rank, action: Update
<info> peer_manager_handler: Connection security failed: role: Peripheral, conn_handle: 0x1, procedure: Encryption, error: 4157
<warning> peer_manager_handler: Disconnecting conn_handle 1.
<info> app: PERIPHERAL: Disconnected, handle 1, reason 0x3D.
<info> peer_manager_handler: Peer data updated in flash: peer_id: 0, data_id: Peer rank, action: Update, no change
<info> app: PERIPHERAL: Connected, handle 1.
<info> app: PERIPHERAL: BLE_GAP_EVT_SEC_PARAMS_REQUEST
<info> peer_manager_handler: Connection security failed: role: Peripheral, conn_handle: 0x1, procedure: Bonding, error: 133
<warning> peer_manager_handler: Disconnecting conn_handle 1.
<info> app: PERIPHERAL: BLE_GAP_EVT_AUTH_STATUS: status=0x85 bond=0x0 lv4: 0 kdist_own:0x0 kdist_peer:0x0
<info> app: PERIPHERAL: Disconnected, handle 1, reason 0x16.
<info> peer_manager_handler: Peer data updated in flash: peer_id: 0, data_id: Peer rank, action: Update, no change
<info> app: PERIPHERAL: Connected, handle 1.
<info> app: PERIPHERAL: BLE_GAP_EVT_SEC_PARAMS_REQUEST
<info> peer_manager_handler: Connection security failed: role: Peripheral, conn_handle: 0x1, procedure: Bonding, error: 133
<warning> peer_manager_handler: Disconnecting conn_handle 1.
<info> app: PERIPHERAL: BLE_GAP_EVT_AUTH_STATUS: status=0x85 bond=0x0 lv4: 0 kdist_own:0x0 kdist_peer:0x0
<info> app: PERIPHERAL: Disconnected, handle 1, reason 0x16.

[Amanda Hsieh]

Hi,

<info> peer_manager_handler: Connection security failed: role: Central, conn_handle: 0x0, procedure: Encryption, error: 4102

The "4102" error corresponds to PM_CONN_SEC_ERROR_PIN_OR_KEY_MISSING and it indicates that the bonding information is deleted on the device, but not on another device side. Can you try deleting the bonding information on the peripheral (PCA10056) or a mobile (central) as well? Make sure to delete the bond information on all the devices. 

Please let me know this can help or not. Thanks. 

-Amanda H.

[jyang]

I cleared the memory and it works fine now.

Even though it works, I have noticed that this serialized code (270k) is bigger than the original one (240k). The serialized code should have no software device code. 

When I modified the code to serialized, I had removed "SOFTDEVICE_PRESENT".

Anything else should I do?

Thank you for your help

[Amanda Hsieh]

Hi, 

jyang said:

The hrs example has two projects, one is single board, the other one is serialized connection.

Sorry, I am confused. Under nRF5_SDK_17.0.2_d674dde\examples\ble_peripheral\ble_app_hrs, there are folders for different DK. Could you post the path regarding projects for the single board and serialized connection?

-Amanda H.

[jyang]

C:\nRF5_SDK_17.0.2_d674dde\examples\ble_peripheral\ble_app_hrs\pca10040\s132\ses

C:\nRF5_SDK_17.0.2_d674dde\examples\ble_peripheral\ble_app_hrs\pca10040\ser_s132_uart\ses

[Amanda Hsieh]

Hi, 

Sorry for the delay. 

Because the memory usage also accumulates the reserved flash for the softdevice, that causes the difference. 

You can use nRF Connect/ programmer to check the real size of the image. 

-Amanda H. 

[jyang]

Thank you. I know it now.

Could you please tell me how to remove this reserved flash space for BLE stack, as the serialization does not need it,

[Amanda Hsieh]

You can refer to ser_s132_uart to modify the flash start address via Project -> Options -> Linker -> Section Placement Macros.

-Amanda H.